Hull Identification Number (A unique 12 digit alpha-numeric identification number that all boats manufactured after 1972 are equipped with on their transom (the flat rear end of the boat) and reflects the manufacturer, serial number, and month and year of build)

Official US Coast Guard Vessel ID (Unique ID awarded by the U.S. Coast Guard to a documented vessel and is permanently marked on some structural part of the hull interior but not to be confused with the manufacturer's hull identification number.)

Lloyd's Registry Number (This is a unique number that is assigned by Lloyd's Registry for the life of the vessel. Most vessels with this number are self propelled, over 100 gross tons, and operate on ocean and/or coastwise waters.)

n/r

Call Sign (Unique code designated for the vessel's radio transmissions)